Cooking device

Abstract

There is provided a cooking device that prevents an electricity conduction setting to a heating source from fluctuating when a user is not intending to operate a touch key. The cooking device includes a heating source for heating an object to be heated; a top plate provided on an upper surface of the device; a touch key that is provided on the top plate and is operable to input a control command by being touched with a finger; a cancel electrode provided at a periphery of the touch key; and a control unit for controlling an electricity conduction to the heating source based on the control command. When detecting that a portion of the top plate near the cancel electrode is touched with the finger, the control unit maintains a condition of electricity conduction to the heating source in time of the detection, and limits an operation based on the control command input to the touch key while detecting that the portion of the top plate near the cancel electrode is being touched with the finger.

1. A cooking device comprising:
 a heating source operable to heat an object to be heated; 
 a top plate provided on an upper surface of the cooking device; 
 a touch key that is provided on the top plate and is operable to input an assigned control command by being touched with a finger; 
 a cancel electrode provided on a lower surface of the top plate at a periphery of the touch key; and 
 a control unit operable to control electricity conduction to the heating source based on the control command and detect whether or not a portion of the top plate near the cancel electrode is touched with the finger; 
 wherein the control unit outputs a high frequency signal to the cancel electrode, 
 wherein when detecting that the portion of the top plate near the cancel electrode is touched with the finger by detecting that an impedance between the cancel electrode and an earth is lowered by greater than or equal to a predetermined value compared to when the portion of the top plate near the cancel electrode is not touched with the finger, the control unit maintains a condition of the electricity conduction to the heating source during time of the detection, and limits an operation based on the control command input to the touch key while detecting that the portion of the top plate near the cancel electrode is being touched with the finger, and 
 wherein the cancel electrode is arranged to surround the touch key with a near side of the top plate opened. 
 
     
     
       2. The cooking device according to  claim 1 , wherein limiting the operation based on the control command input to the touch key while detecting that the portion of the top plate near the cancel electrode is being touched with the finger includes performing a control such that the condition of the electricity conduction to the heating source based on the control command input to the touch key is not changed. 
     
     
       3. The induction cooking device according to  claim 2 , wherein the control unit performs a control such that the condition of the electricity conduction to the heating source based on the control command input to the touch key is not changed within a predetermined period after detecting that the portion of the top plate near the cancel electrode is not touched with the finger from when detecting that the portion of the top plate near the cancel electrode is touched with the finger. 
     
     
       4. The cooking device according to  claim 2 , wherein limiting the operation based on the control command input to the touch key while detecting that the portion of the top plate near the cancel electrode is being touched with the finger includes lowering an input sensitivity of the touch key. 
     
     
       5. The cooking device according to  claim 1 , wherein limiting the operation based on the control command input to the touch key while detecting that the portion of the top plate near the cancel electrode is being touched with the finger includes lowering an input sensitivity of the touch key. 
     
     
       6. The cooking device according to  claim 1 , further comprising an informing unit operable to inform that the control command is not input by touching the portion of the top plate near the cancel electrode. 
     
     
       7. The cooking device according to  claim 1 , further comprising an informing unit operable to inform when the portion of the top plate near the cancel electrode is pushed continuously for longer than or equal to a predetermined time. 
     
     
       8. A cooking device comprising:
 a heating source operable to heat an object to be heated; 
 a top plate provided on an upper surface of the cooking device; 
 a plurality of touch keys that are provided on the top plate, each of the plurality of touch keys being operable to input a corresponding assigned control command by being touched with a finger; and 
 a control unit operable to control electricity conduction to the heating source based on a control command input to a first touch key when detecting that the first touch key is touched with the finger for longer than or equal to a first predetermined time; 
 wherein the control unit performs a control such that a condition of the electricity conduction to the heating source based on the control command input to the first touch key is not changed based on a control command input to a second touch key when detecting that the second touch key is touched with the finger before elapse of a second predetermined time longer than the first predetermined time from when the first touch key is touched with the finger. 
 
     
     
       9. The cooking device according to  claim 8 , wherein the control unit performs a control such that the condition of the electricity conduction to the heating source based on the control command input to the first touch key is not changed based on the control command input to the second touch key when detecting that the second touch key is touched with the finger before elapse of a third predetermined time from when the first touch key is not touched with the finger after the first touch key is touched. 
     
     
       10. A cooking device comprising:
 a heating source operable to heat an object to be heated; 
 a top plate provided on an upper surface of the cooking device; 
 a plurality of touch keys that are provided on the top plate, each of the plurality of touch keys being operable to input a corresponding assigned control command by being touched with a finger; 
 a single cancel electrode provided on a lower surface of the top plate at a periphery of the plurality of touch keys; and 
 a control unit operable to control electricity conduction to the heating source based on a control command and detect whether or not a portion of the top plate near the single cancel electrode is touched with the finger; 
 wherein, when detecting that the portion of the top plate near the single cancel electrode is touched with the finger, the control unit maintains a condition of the electricity conduction to the heating source during time of the detection, and limits an operation based on a control command input to one of the plurality of touch keys while detecting that the portion of the top plate near the single cancel electrode is being touched with the finger, and 
 wherein the single cancel electrode is arranged to surround the plurality of touch keys. 
 
     
     
       11. The cooking device according to  claim 10 , wherein limiting the operation based on the control command input to the one of the plurality of the touch keys while detecting that the portion of the top plate near the single cancel electrode is being touched with the finger includes performing a control such that the condition of the electricity conduction to the heating source based on the control command input to the one of the plurality of touch keys is not changed. 
     
     
       12. The cooking device according to  claim 10 , wherein limiting the operation based on the control command input to one of the plurality of touch keys while detecting that the portion of the top plate near the single cancel electrode is being touched with the finger includes lowering an input sensitivity of the plurality of touch keys.